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CUSTOM GAS & DIESEL TUNING

Built by Enthusiasts for Enthusiasts

Make an Impact

At Piston Twistin, we’re all about horsepower, grit, and pushing limits — but we also believe in giving back. That’s why we’ve partnered with GoodAPI to make every order count for more than just performance.

🔥 Now, with every purchase, we plant a tree to help fight deforestation and offset environmental impact — one truck at a time. Our commitment doesn’t stop there. We also help remove ocean-bound plastic, protecting wildlife and keeping ecosystems clean for future generations.

Whether you're tuning your Duramax or upgrading your build, you’re also helping rebuild forests and clean up our planet. It’s a win for your truck — and a win for the Earth.

Together, with GoodAPI, we’re tracking every impact and making sure your order doesn’t just make power… it makes a difference. 🌲♻️🌍

Our Story

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1. WIN OLS

WinOLS is where the real work happens.
Deep map discovery, full binary control, and true custom calibrations

2. EFI LIVE

Easy for clients to use. Ideal for

early GM & Cummins diesels.

Remote Tuning Made Easy.

3. HP TUNERS

Advanced control and flexibility.

Ideal for newer platforms.

Custom tuning made simple.

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New Additions

2006–2012 Cummins | HP Tuners Custom Tune (5.9L & 6.7L)

2006–2012 Cummins | HP Tuners Custom Tune (5.9L & 6.7L)

$999.00 USD
01–04 Duramax LB7 IHI 67/67 Drop-In Turbocharger – Stock Appearing Upgrade (No Core Required)

01–04 Duramax LB7 IHI 67/67 Drop-In Turbocharger – Stock Appearing Upgrade (No Core Required)

$2,150.00 USD
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Customer Testimonials

  • I’ve had other tunes on my 2012 and none felt this refined. They gave me power, reliability, and the tech support was top-tier. These guys know Cummins inside and out. Even helped me on a Sunday

    Anthony C

  • I use my 2010 Cummins for hauling equipment daily. The tune gave me the torque I was missing, and trans tuning is on point. No hunting for gears, no smoke unless I lay into it—perfect balance all around .

    Josh K

  • Running a 2011 LML with a full weight loss and tune from these guys—absolutely love it. It’s smoother, stronger, and no more annoying check engine lights. My fuel mileage jumped almost 5 MPG on the highway!

    Marcus D

  • These guys absolutely knocked it out with my 2018 Cummins. It’s making clean, reliable power and the transmission tuning is buttery smooth. Customer service was A+ too

    Blake F

  • Running their SOTF tune on my 2017 and I tow heavy with it all the time. Trans tuning is spot-on, EGTs stay cool, and I’ve got power to spare even with 35s. Wouldn’t trust anyone else with my truck.

    Brandon R

  • Running their SOTF tune on my 2017 and I tow heavy with it all the time. Trans tuning is spot-on, EGTs stay cool, and I’ve got power to spare even with 35s. Wouldn’t trust anyone else with my truck.

    Brandon R

  • These guys absolutely knocked it out with my 2018 Cummins. It’s making clean, reliable power and the transmission tuning is buttery smooth. Customer service was A+ too

    Blake F

  • Running a 2011 LML with a full weight loss and tune from these guys—absolutely love it. It’s smoother, stronger, and no more annoying check engine lights. My fuel mileage jumped almost 5 MPG on the highway!

    Marcus D

  • I use my 2010 Cummins for hauling equipment daily. The tune gave me the torque I was missing, and trans tuning is on point. No hunting for gears, no smoke unless I lay into it—perfect balance all around .

    Josh K

  • I’ve had other tunes on my 2012 and none felt this refined. They gave me power, reliability, and the tech support was top-tier. These guys know Cummins inside and out. Even helped me on a Sunday

    Anthony C

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